Internal-combustion engine



Jan. A. PGPE. JR INTERNAL COMBUSTION ENGINE Filed Nov. 10. 1927 1o plane of the line at the top,

Patented Jan. 6, 1931 UNITED STATES PATENT oFFlcs ABTHUR W. POPE,

COMPANY,

.13., or wAuxEsHA, WISCONSIN, n ssxenoa mo wnuxn'sna Moron orlwauxnsna, wrsconsm, A CORPORATION or wxsconsm INTERNAL-COMBUSTION ENGIIIE Application filed November 10, 1927. Serial No. 232,383.

-My invention relates to internal combusv tion engines and particularly to their combustion chambers and the immed1ate appurtenances thereof, to the end of numerous ad- 5 vantages in construction, operation and results.

In the accompanying drawings, Figure 1 is a horizontal sectional view of the engine of my invention taken on the 1--1 of Figure 2; and

Figure 2 is a vertical sectional view thereof taken on the plane of the line 2--2 of Figure 1.

The block 3 rovides the cylinder 4, open an the exhaust 5 in lateral relation thereto and terminating in the top of the block as the cylinder does. The ex- 1 haust valve, which opens upwardly, is shown at 6.

The head 7, suitably secured upon the top of the block, with the gasket- 8 intervening, is so formed as to provide a pocket 9 overlying the exhaust valve 6 and a portion of the cylinder, as shown. That portion of the underside of the head 7 other than the throat 10 which affords communication between the the pocket 9 and the cylinder 4, lies close to the top of the cylinder as indicated at 11. The piston 12, which reciprocates in the cyllinder 4, is so arranged that in its uppermost position it comes close to the portion 11 of the head, the purpose being to confine the gases substantially entirely to the pocket 9 when the piston is at the top of its stroke.

The intake passageway is formed in the head, as indicated at 13, being so disposed as to terminate in the portion 11 thereof, as shown. The intake valve, which opens downwardly, is shown at 14, being operated by a rocker-arm 15 engaging with the end of its stem and operated, in turn, by the push rod 16 which is actuated by the cam shaft (not shown).

The spark plug is provided as shown at 17 The head, as a whole, is cored out where feasible, as indicated at 18, for the circulation of the cooling medium, the same being true of the cylinder.

By virtue of the construction described, a

valve,

compact. turbulence-producing combustion chamber is secured, the gases entrapped below the portion 11 of the head, when the piston is in its uppermost position, being negligible. The intake valve 14 may be made large, and given a high lift, in order to meet demands, and this .without increasing engine length or interferin with complete water jacketing of its seat. ue to the fact that itis feasible to use a relatively small exhaust the distance between cylinder center and exhaust valve center,'which affects the engine .width and combustion chamber compactness, may be 'kept small, without afl'ecting the size of the intake valve. The direct intake into the cylinder increases volumetric efiiciency. The above features enable the use of high compression ratios.

I claim 1. In an internal combustion engine, :1. cylinder, a piston reciprocating in said cylinder,

an exhaust passage lying alongside said cylterminating in said last-named portion thereof wholly on the other side of the center of said cylinder, valves for said passages, and ignition means in said pocket.

2. In an internal combustion engine, a cylinder, a piston reciprocating in said cylinder, an exhaust passage lying alongside said cylinder, a head having a pocket overlying-sci exhaust and part of said cylinder on one side of the center thereof and having a portion lying over and close to the remainder of'the cylinder area, said pocket representin all of the efiective combustion space when 51c piston is in the position of greatest compression, an intake passage in said head terminating in said last-named portion thereof wholly on dais said exhaust and part of said cylinder and having a portion lying over and close to the remainder of the cylinder area, an intake passage in said head terminatin' in said last 5 name portion thereof, valves or said passages, and ignition means in said pocket.

4. In an internal combustion engine, a cylinder, a piston reciprocating in said cylinder, a combustion chamber adjoining and communicating restrictedly with the end of said cylinder on one side of the center thereof, said combustion chamber representing all of the effective combustion space when the piston is in the position of greatest compression, a burned gas outlet passage for said combustion chamber, said combustion chamber being otherwise closed, and a combustible gas inlet passage directly for said cylinder communicating therewith. wholl on the other side of the center thereof, said cylinder being otherwise closed, valves for said passages, and spark ignition means within said combustion chamber.

In witness whereof, I hereunto subscribe my name this 9th day of November; 1927. ARTHUR W. POPE, JR. 

